Hyderabad, Jan 7: At least eight persons, most of them students, were killed and 20 injured when a state-run bus in which they were travelling turned turtle and fell into a gorge in Andhra Pradesh's Anantapur district on Wednesday.

The incident occurred at around 8:30 AM when the Andhra Pradesh State Road Transport Corporation (APSRTC) bus was going to Penukonda from Madakasira in the district, Anantapur District Superintendent of Police Rajsekhar Babu said.

"As per the information available, at least eight people were killed in the mishap. Police personnel are carrying out rescue operation," Babu told reporters over phone.

The injured have been shifted to different hospitals in Hindupur and Anantapur, Joint Collector S Satyanarayan said.